Panel buttress



FIG. 1 is a fragmentary perspective view of a panel buttress showing our new design;

FIG. 2 is a fragmentary side elevational view;

FIG. 3 is a fragmentary top plan view;

FIG. 4 is an end elevational view; and

FIG. 5 is another perspective view thereof.

FIG. 6 is a perspective view of a second embodiment of a panel buttress showing our new design,

FIG. 7 is a fragmentary top plan view thereof.

FIG. 8 is a perspective view of a third embodiment of a panel buttress showing our new design;

FIG. 9 is a fragmentary top plan view thereof.

FIG. 10 is a perspective view of a fourth embodiment of a panel buttress showing our new design;

FIG. 11 is a fragmentary top plan view thereof.

FIG. 12 is an enlarged, fragmentary top perspective view of a buttress portion of our design.

FIG. 13 is a perspective view of a fifth embodiment of a panel buttress showing our new design;

FIG. 14 is a perspective view of a sixth embodiment of a panel buttress showing our new design. 

The ornamental design for a panel buttress, as shown and described. 